"This investigation is still very much ongoing," she said on Thursday, urging anyone with information that would assist police to contact the RCMP or the Saint John Police Force.

"Our investigators with the RCMP technological crime unit are going through the evidence that was seized and analyzing the images" in an effort to identify the children involved, Farrah said.

More charges are possible, she has said.

Farrah could not speculate how much longer the investigation, which began in Toronto in 2011, will take. "It's going to take the time that's going to be required," she said.

The mayor said he received Snook's letter of resignation from his defence lawyer.

"The letter has been forwarded to the common clerk and staff will follow procedures regarding vacancies as outlined in the Municipalities Act," Norton said.

Under the act, council has two months to officially declare a vacancy by way of resolution.

The clerk then has 10 days to notify the municipal electoral officer, who holds a byelection to fill the vacancy.

The next regularly-scheduled round of municipal byelections across the province will be on May 13.

The other members of council have been notified, said Norton.

Snook's lawyer Dennis Boyle said he was visiting his client in jail when he received the resignation letter.

"He asked me if I would do him a favour and he passed me a piece of paper and said, 'This is my resignation, would you see that that gets into the hands of Mayor Norton?' I called Mayor Norton and Mayor Norton just said, 'I could pick that up tomorrow morning.'

"So he came to my office yesterday morning. I said good morning to him, gave him the piece of paper, the resignation, and he said, ‘Thank you’ and it was over," said Boyle.

Snook was elected to council in 2008 and re-elected in May 2012 with 2,303 votes.

He was one of only two incumbents who successfully sought re-election.

He has served in Ward 3, which includes part of the south end, lower west side and part of the east side.